Electroplating solution and method for electroplating steel shell by using it

Abstract

The invention discloses an electroplating solution and a method for electroplating a steel shell by using the electroplating solution. The solvent of the electroplating solution of the electroplating solution is water, and the NiSO 4 The concentration is 30‑60g / L, NiCl 2 The concentration of sodium lauryl sulfate is 10‑30g / L, the concentration of sodium lauryl sulfate is 0.05‑0.3g / L, the concentration of acetylenic compounds is 0.1‑0.5g / L, and the concentration of allyl sodium sulfonate is 1.0‑1.5 g / L. On the inner surface of the steel shell, through the synergistic effect of each component in the electroplating solution, a denser and uniformly electroplated nickel coating can be obtained, and the concentration of iron ions in the steel shell is below 5ppm, and the nickel on the inner surface of the steel shell The thickness of the coating is not less than 0.5 microns, and the thickness of the nickel coating on the inner top of the steel shell is 0.2-0.4 microns, in order to reduce the problems of gas swelling and liquid leakage caused by the formation of primary batteries inside the battery after long-term storage, thereby improving The electrical performance of the battery.

Description

technical field [0001] The invention belongs to the field of electrochemistry, in particular, the invention relates to an electroplating solution and a method for electroplating a steel shell by using the electroplating solution. Background technique [0002] Generally speaking, an alkaline battery is composed of a steel shell, a cathode, an anode, a diaphragm, and an electrolyte. Among them, the steel shell is one of the most important parts of the alkaline manganese battery, which plays the dual role of the active material storage container and the positive electrode collector in the battery. As an active material container, it must have sufficient mechanical strength, occupy as little space as possible in the battery, and be able to withstand the corrosion of chemical substances inside the battery; as a positive electrode collector, it must have as high a conductivity as possible, and The best possible electrical contact with the positive active material is possible. Th...

AI Technical Summary

Problems solved by technology

However, in the subsequent electroplating process, since the steel case of the battery is a deep-hole device, the nickel plating layer inside the steel case is unevenly plated, which leads to the precipitation of iron ions in the steel case into the electrolyte. Galvanic cells are formed inside the battery, causing bloating and gas leakage

However, the nickel-plated cold-rolled thin punched steel case is expensive, and the nickel coating may be torn during the punching process, resulting in iron ions in the steel case being precipitated into the electrolyte, and stored in the battery for a long time. Forming a primary battery, causing inflation and gas leakage, affecting the electrical performance of the battery, and even more serious damage to electrical appliances

Images